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US 8,984,875 B2Granted
Pump control operating system of construction machine
AssigneeDoosan Infracore Co., Ltd.
InventorDal Sik Jang
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AssigneeDoosan Infracore Co., Ltd.
InventorDal Sik Jang
Estimating the term…
The present disclosure is a construction machine, such as an excavator, which comprises a plurality of hydraulically driven actuators, in which some of the actuators are provided in a one-to-one pump system where hydraulic pumps are connected to the respective actuators such that a working fluid is supplied from the respective pumps, and the remaining actuators are provided in an auxiliary control valve system where the working fluid is distributed by an auxiliary control valve connected to one or more pumps. When an amount of the working fluid of an actuator associated with the auxiliary control valve is insufficient, the actuator associated with the auxiliary control valve is connected to a pump of the one-to-one pump system to share the pump of the one-to-one pump system.
A pump control operating system of a construction machine comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Hydraulic or pneumatic drives: with energy recovery arrangements, e.g. using accumulators, flywheels
Control of flow rate; Load sensing arrangements: using two or more pumps with cross-assistance
Hydraulic circuits: systems using center bypass type changeover valves
Hydraulic circuits: systems with two or more pumps
About 5 years 5 months of term left · ends 20 Mar 2032 (estimated)
This Application is a Section 371 National Stage Application of International Application No. PCT/KR2010/009238, filed Dec. 23, 2010 and published, not in English, as WO2011/078588 on Jun. 30, 2011.
The present disclosure relates to a pump control operating system of a construction machine, and more particularly, to a pump control operating system of a construction machine equipped with pumps corresponding to respective actuators.
In general, a construction machine is driven by using a hydraulic pressure. The hydraulic pressure is supplied from one or more hydraulic pumps operated by an engine. The hydraulic pumps pressure working oil and supply the pressured working oil to respective actuators. The working oil is properly distributed to the actuators via a distributor called a main control value.
FIG. 1 is a diagram of a pump control operating system of a construction machine according to an exemplary embodiment of the present disclosure.
FIG. 2 is a diagram of a pump control operating system of a construction machine according to another exemplary embodiment of the present disclosure.
A: One-to-one pump system B: Auxiliary control valve system 100: Boom cylinder 105: Boom pump 110: Arm cylinder 115: Arm pump 120: Auxiliary control valve 130: Driving motor 135: Bucket cylinder 140: Option 151: First boom interrupting valve 152: Second boom interrupting valve 153: Third boom interrupting valve 161: First arm interrupting valve 162: Second arm interrupting valve 163: Third arm interrupting valve 164: Fourth arm interrupting valve
Hereinafter, a pump control operating system of a construction machine according to an exemplary embodiment of the present disclosure will be described with reference to the accompanying drawings. In this process, the thicknesses of lines or the sizes of constituent elements illustrated in the drawings may be exaggerated for clarity and convenience of explanation. The below-described terms are terms defined in consideration of the functions of the present disclosure, and may be changed according to an intention of a user or operator or customs.
FIG. 1 is a diagram of a pump control operating system of a construction machine according to an exemplary embodiment of the present disclosure. FIG. 2 is a diagram of a pump control operating system of a construction machine according to another exemplary embodiment of the present disclosure.